The aural channel consists of the vocalizations that form and accompany spoken words. The visual channel includes the speaker’s physical actions and appearance, including facial expressions, eye contact, gestures, posture, immediacy, physical appearance, dress, and objects held.
Speakers use the “rule of three” when they pick three audience members to focus on—one in the middle, one on the right, and one on the left of the room; these audience members serve as anchors as the speaker scans the room.
Nonverbal immediacy is the perceived physical or psychological closeness between a speaker and his or her audience members.